Question: Two samples of electronic components were tested in two different testing conditions see results below. The first test at 353K was suspended after 250

Two samples of electronic components were tested in two different testing conditions – see results below. The first test at 353K was suspended after 250 hrs.

Estimate the 90% two sided intervals for the MTTF for each of the temperatures.

Also estimate the one sided confidence interval for the MTTF for both 90% and 95% confidence.

Based on the one-sided values, find the reliabilities at 100 hrs for both confidences and temperatures, assuming constant failure rate (4 values).

353(80 degrees C )
55hFAIL
63hFAIL
80hFAIL
209hFAIL
250hSUSPENDED


373k (100 degrees C)

13h FAIL 15h FAIL 30h FAIL 41h FAIL 57h FAIL 93h FAIL 109.9h FAIL

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